Antonyms of noun inessentiality

1 sense of inessentiality

Sense 1
inessentiality -- (not of basic importance)
       Antonym of essentiality (Sense 1)
      => essentiality, essentialness -- (basic importance)

Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun inessentiality

1 sense of inessentiality

Sense 1
inessentiality -- (not of basic importance)
       => unimportance -- (the quality of not being important or worthy of note)